дано
W(CaCO3) = 82%
m(CH3COOH) = 25.6 g
m(ppa CaCO3)-?
CaCO3+2CH3COOH-->(CH3COO)2Ca+CO2+H2O
M(CH3COOH) =60 g/mol
n(CH3COOH) = m/M = 25.6 / 60 = 0.43 mol
n(CaCO3) = 2n(CH3COOH)
n(CaCO3) = 0.43 / 2 = 0.215 mol
M(CaCO3) = 100 g/mol
m(CaCO3) = n*M = 0.215 * 100 = 21.5 g
m(ppa CaCO3) = m(CaCO3) * 100% / W(CaCO3) = 21.5 * 100% / 82% = 26.2 g
ответ 26.2 г
Объяснение:
дано
W(CaCO3) = 82%
m(CH3COOH) = 25.6 g
m(ppa CaCO3)-?
CaCO3+2CH3COOH-->(CH3COO)2Ca+CO2+H2O
M(CH3COOH) =60 g/mol
n(CH3COOH) = m/M = 25.6 / 60 = 0.43 mol
n(CaCO3) = 2n(CH3COOH)
n(CaCO3) = 0.43 / 2 = 0.215 mol
M(CaCO3) = 100 g/mol
m(CaCO3) = n*M = 0.215 * 100 = 21.5 g
m(ppa CaCO3) = m(CaCO3) * 100% / W(CaCO3) = 21.5 * 100% / 82% = 26.2 g
ответ 26.2 г
Объяснение: